getToolParameter("ToolName","Radius") for PROBE

I try to get probe radius for touch probe NX tool, no results. My probe from liblrary, libref is ugt0402_001 (NX10.0.3.5) and I cannot to get radius of probe. I must to say - no any records in lib about probe radius.

When I run getToolParameter getToolParameter("UGT0402_001","Length1") - I received 122.00,